<template>
  <el-row class="login-page" justify="center" align="middle">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="6" :offset="3" class="form">
      <!-- 注册表单 -->
      <el-form
        ref="form"
        size="large"
        autocomplete="off"
        v-if="isRegister"
        :model="registerData"
        :rules="rules"
      >
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input
            :prefix-icon="User"
            placeholder="请输入用户名"
            v-model="registerData.username"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
            v-model="registerData.password"
          ></el-input>
        </el-form-item>
        <el-form-item prop="rePassword">
          <el-input
            :prefix-icon="Lock"
            type="password"
            placeholder="请再次输入密码"
            v-model="registerData.rePassword"
          ></el-input>
        </el-form-item>
        <!-- 注册按钮 -->
        <el-form-item>
          <el-button
            class="button"
            type="primary"
            auto-insert-space
            @click="register"
          >
            注册
          </el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false; clearRegisterData()">
            ← 返回
          </el-link>
        </el-form-item>
      </el-form>
      <!-- 登录表单 -->
      <el-form
        ref="form"
        size="large"
        autocomplete="off"
        v-else
        :model="registerData"
        :rules="rules"
      >
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input
            :prefix-icon="User"
            placeholder="请输入用户名"
            v-model="registerData.username"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            name="password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
            v-model="registerData.password"
          ></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox>记住我</el-checkbox>
            <el-link type="primary" :underline="false">忘记密码？</el-link>
          </div>
        </el-form-item>
        <!-- 登录按钮 -->
        <el-form-item>
          <el-button
            class="button"
            type="primary"
            auto-insert-space
            @click="login"
            >登录</el-button
          >
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = true;clearRegisterData()">
            注册 →
          </el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<script setup>
import { User, Lock } from "@element-plus/icons-vue";
import { ref } from "vue";
import { ElMessage } from 'element-plus'
import { useRouter } from 'vue-router'
import { useTokenStore } from '@/stores/token.js'
import { userLoginService, userRegisterService } from "@/api/user.js";

const isRegister = ref(false);
const registerData = ref({
  username: "",
  password: "",
  rePassword: "",
});

const checkRePassword = (rule, value, callback) => {
  if (value === "") {
    callback(new Error("请再次确认密码"));
  } else if (value !== registerData.value.password) {
    callback(new Error("请确保两次输入的密码一致"));
  } else {
    callback();
  }
};

const rules = {
  username: [
    { required: true, message: "请输入用户名", trigger: "blur" },
    { min: 5, max: 16, message: "长度为5~16位的非空字符", trigger: "blur" },
  ],
  password: [
    { required: true, message: "请输入密码", trigger: "blur" },
    { min: 5, max: 16, message: "长度为5~16位的非空字符", trigger: "blur" },
  ],
  rePassword: [{ validator: checkRePassword, trigger: "blur" }],
};

const register = async () => {
  let result = await userRegisterService(registerData.value);
  ElMessage.success(result.message ? result.message : "注册成功");
};

const router = useRouter();

const clearRegisterData = () => {
  registerData.value = {
    username: '',
    password: '',
    rePassword: ''
  };
};

const tokenStore = useTokenStore();

const login = async () => {
  let result = await userLoginService(registerData.value);
  ElMessage.success(result.message ? result.message : '登录成功');
  tokenStore.setToken(result.data);
  router.push('/welcome'); // 登录成功后跳转到欢迎页面
};
</script>

<style lang="scss" scoped>
.login-page {
  height: 100vh;
  width: 100vw;
  background-color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;

  .bg {
    background: url("@/assets/login_bg.jpg") no-repeat center center;
    background-size: cover;
    height: 100%;
    width: 100%;
  }

  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
    max-width: 400px;
    width: 100%;

    .title {
      margin: 0 auto;
    }

    .button {
      width: 100%;
    }

    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>
